builtin gamma function

[Ian Lance Taylor]

James Hirschorn <James.Hirschorn@hotmail.com> writes:

> I have noticed that the builtin gamma function is very accurate and
> extremely fast. Can someone tell me where to find the source code for the
> implementation?

Are you calling it on a constant?  Because gcc will fold gamma applied
to a constant which meets certain characteristics.

If you aren't calling it on a constant, then you are getting the
function from your libc.  gcc does not itself include an implementation
of the gamma function.

Ian